The Blues increased their lead at the summit after a 2-1 win over Aston Villa on Saturday, as Manuel Pellegrini's Manchester City side stuttered to 1-1 draw against Hull City.
When asked if the gap between the two sides was now insurmountable, Mourinho told reporters: "In another country I would say it's fantastic, in this country I say it's nothing.
"Every game is difficult, anything could happen. Seven points means seven points but you have 14 matches to go. You are speaking about 42 points to play for, we have a lead of seven. I think it's nothing.
"When you are top of the league you don't need the other teams to lose points. If they lose, good, but we have to focus on ourselves. if we win the next game we have a seven point lead with 13 matches to go."
Pellegrini, meanwhile, is adamant that City are not worried about being seven points behind. He said: "No we are not concerned about the gap. We are concerned about how we can score the goals again.
"I think that once again we couldn’t create the space. We didn’t have clear chances to score because we are not playing well when attacking. It’s very clear what we must do. The team is running, has spirit and possession of the ball.
"The way we got the point was not so bad as we scored in the last minute. We must work and try to improve."
